Platform-scale



(No Model.) 2 Sheets-Sheet 1.

A. H. EMERY. PLATFORM vSCAI.- Patented June 5, 1883.

FIG.2 8

144 llll/ Xf- N. PEYERS. Phvmumngnpmr. wnhinghw. D. CA

2 Sheets-Sheet 2.

(No Model.)

A.EBMBBY.

PLATFORM SCALE.

Patented June 5, 1888.

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UNITED STATES PATENT OFFICE.

I ALBERT EMERY, OF NEW YORK, N. Y., ASSIGNOR TO THE EMERY SCALE COMPANY,OF STAMFORD, CONNECTICUT.

PLATFORM-SCALE.

SPECIFICATION forming part of Letters Patent No. 278,903, dated June 5,1883.

- Application filed February 5. 1881. (No model.)

To all whom it may concern Be it known that l, ALBERT H'. EMERY, of thecity, county, and State of New York, have invented certain new anduseful Improvements in Scales, of which the following is aspecification.

The invention relates to portable platformscales with hydraulic-pressurechambers. The bed-framc ofthe scale is constructed with a shelf orshelves for the reception of one or more platformsiippoits which arebolted\\to the base. Springs of rubber or other material are interposedbetween the platform and its supports. The weigh-beam has its fulcrum 4i 5 iattachments on a hollow pillar fianged for attachment to the bed.The pressure is transmitted from a liquid-chamber in the base of theplatfor'nrsupp ort through a pipe connected to the base of said supportby means of a seal- 2O ing-plug constructed with a recessed nipple topermit the escape of air in filling the chamber, as hereinafterdescribed. The other end of `the pressure-pipe is connectedbyascrew-plug to the base of the liquid-chamber, from which 2 5Apressure is transmitted to a column acting on the beam, a vent-aperturebeing provided in the neck of the liquid-chamber to allow the escape ofair contained in said neck while screwing a pipe-plug into it7 the pipeand chamber having previously Abeen filled with liquid. Thevertically-moving parts are held against horizontal motion by flexibleplates clamped thereto and to proper parts of the bed or frame. Theweigh-beam is provided 5 5 with a weight-rod carrying a tareweight limited in its movement by an adjustable stop, so that the ,range of motionof the weight can be varied to correspond with the weight of a scoop orother containingyessel on the platform. In

4o order to allow the limited vertical play ofthe platform whilepreventing its separation from the bed, screws are employed, passingthrough lugs within the bed and fixed in the under side of the platform,with heads to constitute 4 5 stops by coming in contact with the lugswhen the platform is lifted.

In the accompanying drawings the invention is represented in twelvefigures, numbered 28 to 39, inclusive. Figure 28 is a side elevation,

5o partly in section, of the lower part of a scale illustrating theinvention. Fig. 29 is a vertical section of the base of the pillar andpressure-column on a large scale. Fig. 3() is a plan of the entire lowerpart with a portion of the platform removed. Fig. 3l is an cnd eleva- 55v tion of the same, partly in section. Fig. 32 is a vertical section ofone corner of the bed and platform and of one of the hydraulic supports.Fig. 33 is a plan of said support. Fig. 34 is a front elevation of theupper portion of 6o the scale, partly in section, in a modified form.Fig. 35 is a vertical section of the lower portion, illustratingcorresponding modifications in details of construction. Fig. 86 is aplan of the parts shown in Fig. 35, with a portion of the platformremoved. Fig. 37 is a vertical section, on a larger scale, ofthe base ofthe pressure-column and the pressure-chamber on which it rests. Fig. 38is a plan of a portion of the pressure-chamber. Fig. 39 is a verti- 7ocal section of a portion of the pressure-support chamber and itsconnections.

, 241 represents the bed, which may be mounted on wheels 242, ifdesired. In carrying out the first part of the invention the said bed isconstructed with shelves 243 at the corners, for the reception of thesupports of the platform 244. These supports are four in number in theillustration given in Figs. 28 to They consist each of a fianged andchambered base, 8o 245, a pressure-diaphragm, 246, a shell, 247, betweenwhich andthe base the edge of the` diaphragm is clamped, and a column,248, resting on the diaphragm and supported by the pressure ofthe liquidin the chamber beneath it. The support, base, and shell are fastened atogether and to the shelf of the bed by screws 249. The upper part ofthe column is fixed against horizontal motion by a fiexible annularplate, 250, secured at it-s inner edge within 9o a groove in the top ofthe column and at its outer edge to the top of the shell 247 The columnsare surmounted by sprin 251, of rubber or other material, to preventshocks given to the platform being transmitted to the sup- 9 5 ports onwhich the corners ofthe platform rest.

The liquid pressure pipe 252 may be attached to the chamber incommunication with the outlet-duct by means of a coupling and sealingplug, 253, soldered to the'said pipe and Ioo screwed into the chamber-base, where the metal of the base is sufficiently homogeneous and t'reefrom porosity. lt is preferred, howl is soldered an impervioussheet-metal lining,

ever, to secure the end of the pipe to a nipple applied removably to theease, in connection with an impervious lining of sheet metal, ashereinafter described. The pipes 252, one 'for each support, which, inthe illustration above described, are tour in number, are carriedseparately to as many pressure-chanibers at the base ofthe colunnnwhiehtransmits the pressure to the weigh-beam.

The mode ot' applying a number ot' pressurechanrbers to the weigh-beamcolumn Constitutes, in part, the subject ot.' another application forLetters-Patent, and is not essential to the present invention.

A plurality oi' pressure-chambers suitable t'or use-with a plu ralityot' platform-supports are illustrated in Fig. 29.

254,- are Coupling and sealing plugs connecting eaeh` otthe pipes 252wit-h a pressure-chamber, 275, said chambers being covered by diaphragms276, secured at their edges by riiigs 256 and supporting separate shortColumns 257, on all ot' which the base 25S ot' the weigh-beam eolumn.259 rests. The colun'in-base 258 is eonneeted to the column 259 by ascrew-thread, and clamps the inner edge oli' a ilexible lixingplate,260, the outer edge oi' which is held by a ring, 26.1., lastened to theflanged bottom ot' the pillar 262 by screws 263, somel oi.' which,passing through the bed 241, tix the pillarI to the bed. Thepressure-collimn is thus held eoncent-rically within the hollow pillar,while having freedom i'or the slight vertical motion. required, and theentire structure 25S 259 26() 261 262 may be li't'ted bodily from thebase without disturbing the hydraulie-pressurechaml'iers.

Figs. :il to 39, inclusive, illustrate the appli'- ation oll theinvention to a small-er class ot' scales with asingl e support under theplatiorm and a single pressure chamber under the weigh-beam column. ln.this illustration the support-el)amber base 245 is shown as t'ormed Vinone piece with the bed. 'lhe iixing-plate 255, which stays the lowerendot' the supporteolumn 248, is elamped b v a ring, 264, which,

one o'i which is held on the outside by a r1n.g,'

270, and screws 271., clamping the said plate to the bed or main trame2li.. The bolt; 266 may be held vfrom turniiiig wh ilel the nut isapplied either by making its head angular or by the insertion ot' a pinor screw, 282.

The pressure-pipe 252 'is permanently secured in asealing-bloek, 253",Fig. 39, to which 27 2, covering the base of the eli-amber and solderedat its periphery to the diaphragm 2-1-6,

so as form. a sealed chamber. A. nipple, 2m, projecting trom thesealing-block 253L through the lining 27 2 affords a communicationbetween the chamber and thepipe. This nipple, by rising into the highestpart ot the chamber, constitutes an ett'eetive means ot' allowing thecomplete eseape ot' air in tilling the chamberwith liquid. A. .recess orchannel, 2'7-l, is termed in the chamber-base 24:5 to receive the pipe252 and connecting-plug 353, lhe pipe 252, plug 253, lining 272, anddiaphragnr2-l6. having been previmlsly connected together, are readilyadjusted to the base, and can be as readily removed therefrom at anytime at'- ter taking ot'li the clamping-'ring 264C and ease 247 and theplatt'ornr-support column.

When a single pressnre-srumort is used the iianget'l pillar 262 may bebolted direetlyto the bed, as illustrated in Figs. il and 95, inelosingwithin it the chamber-plate 275, which is covered by a diaphragm, 276,secured. at its periphery by a ring, 256, as before. The ring 261 may becast with the bed-traine, as in Fig. 35. In some eases the fixing-plate260 and ring 261 may be dispensed with, the pillar 262 Abeing bolteddirectly to the bed, as in Fig. 37 is an enlarged sectional view, and

Fig. 3S a plan, ot' the chamber with the lowerI partoft' the column inposition.

Dotted lines in the plan show the tlat l'orm ol' the neel; $375 ot' thechamber-base, to adapt it to receive the wrench in screwing it on. theplug 35i.

299, Fig. $37, represents a vent-aperture, to permit the escape ol' airi'oreed out ot the serew-neek while putting together the pipe andchamber, said pipe and chamber having been previtmsly iilled withliquid.

277 represents a ring or envelope surrminding the plate 275 und ring256, so as to cover and seal the joint between them, as described andclaimed in another ap1 )lieatiou. The pressure-column 259 may restdireetly on the diaphragm, as in Fig. .2i-l, or through the medium oi.'a removable base, as in Figs. .25 and 37, as preferred.

The weigh-case trame 27o` maybe made in one piece with the pillar 262,or separately, as preferred. 279, l'or the reception ot' weights 280,t'or ap. plieation to a weight-rod, 281., suspended from the bea-m 203in. customary manner.

207 :represents a rod composed otbrass or other metal more expansible byheat than that ot' wl'iieh the pillar 262 and ease are Composed. Saidrod is made adjustable in its effective length, and acts, through themedium o'lasuitable spring, 20S, to bear down on the base of the eolnninwith a pressure varying with the temperature, so as to counteractthepressure from expansion ot'the liquid in the pressure-chamber.

The weigh-beam is connected to the easing by a flexible compressiont'ulerum-plate, 282,

lt is provided with a shell',`

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clamped to a fulcrum-block, 283, which is bolted to the frame. Thecolumn 259 acts on the beam through a compression-plate, 284. Theindicator-rod 285 is suspended from the upper part of the case bythin-plate connections 286, and .connects by bracket 287 and thin plates288 with the weight end of the beam 203 rin substantially the mannerdescribed in another application.

289 is a weight-rod attached to the lugs or brackets 290 291 at the endsof the beam, and carrying a balancing-weight, 292, and a weighing-weight, 293, the latter being used in connection with the smallgraduations shown on the beam. This device is described and claimed inanother application.. A sliding weight, 294, isused in connection withgraduations (seen at the upper part ofthe i beam) for weighingquantities between those indicated by the large weights 280 and smallfractional weight 293.

- 295 represents a tare-weight sliding on the rod 289, and limited inits motion by an adjustable stop, 296, so as to permit a range of motionto the tare-weight equal in value to the weight of the scoop or otherobject which the said tare-weight maybe required to bal.- ance. Thescale being properly balanced, with the scoop or other tare-load on theplatform and the tare-weight 295 against the lug 291 at the extremityofthe beam, the stop 296 is so adjusted that when the tare-weight isslid back against it the scale will balance with the scoop oif.

297 represents a secondary tare-weight sliding on the indicator-rod. 298is a combined guide-plate and indicator-plate attached tothe beam at ornear its fulcrum end.

The bed is constructed with inwardly-projecting lugs 2411, Figs. 28, 30,31, with apertures for the reception of screw-bolts 241D, each passingfreely through the said lugs or eyes, and fixed in the. under side oftheplatform 244, leaving sufficient play between the said bolts and thelugs or eyes 241% The upper edge ofthe bed constitutes a stop to limitthe descent of the platform by the contact of the flange projectingabove said upper edge. The heads of the screws 241b constitute stops tolimit the upward movement of the platform,

- so that an attempt to lift the scale by its platform will not cause aseparation and derange ment of the parts or any other. injurious effect.

Vhatever novel subject-matter l have set, forth and not claimed orattempted to claim herein I have claimed or attempted to claim in otherapplications or have reserved to be claimedin futurev originalapplications.

The following is claimed as new 1. In weighing-scales, in combinationwith hydraulic-pressure supports, the bed-frame constructed with shelves243 at the corners for the reception of said supports, as hereindescribed.

2. The combination 'of the shelf 243, support-base 245, case 247, andscrews 249 for connecting the said parts, as herein described.

3. In combination witha platform, 234,`and the pressure-column 248 of ahydraulic support, one or more suppOrtingsprings, 251, interposeddirectly between the said platform and pressure column or columns,substantially as set forth. i

4. The combination of the lianged bed 241, the hydraulic platformsupport or supports, the liquid-pressure pipes 252, the pressure chamberor chambers 275, the base-plate 258, the pressure-column 259, and theflanged pil` lar 262, as and for the purposes set forth.

5. The continuous-pressure diaphragm 246, suitably secured to abase-lining, 27 2, substantially as set forth.

6. The combination of the diaphragm 246, lining 27 2,sealingplug 253,with raised nipple 273, and the pressure-pipe 252, as and for thepurposes set forth.

7. The removable pressure-column base 258, constituting a nut, incombination with a fixing-plate, 260, secured to the column by saidscrew-base, as described.

8. The combination 'of the fianged bed 241, chamber-plate 27 5,clamping-ring 261, flexible fixing-plate 260, and lianged pillar 262,substantially as set forth.

9. In a hydraulic scale, the chamberstem 275,with a vent, 299,permitting the escape of air while the plug is entering, as eX- plained.

10. The combination,with the weigh-beam 203, of the weight-rod 289,weighing-weight 293, tare-weight 295, and adjustable stop 296, as andfor the purposes set forth.

11. The combination of the bed 241, lugs 241, screws 2411, and platform244, as and for the purposes set forth.

ALBERT H. EMERY.

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